NASA NTRS · 19790000568
A plasma-sprayed valve coating
Abstract
Need to reduce wear on nickel alloy seats and poppets for Space Shuttle main engine led to fused cobalt/tungsten carbide coating. Coating, which is dense, wear-resistant, and nonporous, can be applied in controlled amounts to various substrate configurations. Ease of application to parts with intricate shapes and contours should make coating useful in automotive and aircraft manufacturing.
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Brennan, A., Olmore, A. B.. 1980-06-01. A plasma-sprayed valve coating. https://ntrs.nasa.gov/citations/19790000568
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